Locating the Source of Long-Distance Radio Distress Signals from the Southern Ocean

This report summarizes a feasibility study and strategy appropriate to search and rescue operations for ships or aircraft in distress in the Southern Ocean. The use of high frequency ionospherically-propagated radio transmissions is justified. Measurement of the direction of arrival of a radio signa...

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Bibliographic Details
Main Author: Goodwin, G. L.
Other Authors: ELECTRONICS RESEARCH LAB ADELAIDE (AUSTRALIA)
Format: Text
Language:English
Published: 1988
Subjects:
Direction Finding
Escape
Rescue and Survival
*RADIO SIGNALS
*SEARCH AND RESCUE
*DISTRESS SIGNALS
RESCUES
FEASIBILITY STUDIES
LONG RANGE(DISTANCE)
OCEANS
DOPPLER SYSTEMS
AUSTRALIA
SOUTH(DIRECTION)
TROUGHS
REAL TIME
AIRCRAFT
IONOSPHERE
POSITION(LOCATION)
Southern Ocean
Online Access:http://www.dtic.mil/docs/citations/ADA198239
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA198239
Description
Summary:This report summarizes a feasibility study and strategy appropriate to search and rescue operations for ships or aircraft in distress in the Southern Ocean. The use of high frequency ionospherically-propagated radio transmissions is justified. Measurement of the direction of arrival of a radio signal facilitates ray-tracing through the ionosphere Characteristics of the F2 region mid-latitude ionization trough are considered in detail. Because the trough is displaced towards Australia, its position must be known as near as practicable in real time for sufficiently accurate ray-tracing to be performed quickly enough after receipt of a distress signal. The differential Doppler technique using e.g. 150 and 400 MHz transmissions from NAVSAT (NNSS) satellites is recommended in locating the trough position.

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